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What's the difference?

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All stages · Demo 389

Nigeria TIN

Choice ng / vat / other. Ten digits; weights 3-7-2-4-8-5-9-1-6. Jev never mods 11. Nine digits need 10.

ChoiceNG 3-7-2 in JS

A digit tape. 1234567893 books an FIRS plate. A last-digit flip rejects. Nine digits never pass.

replaykind —ng —

STANDBY

All 4056 stages

Educational stage on jev.page — not the official TypeSafe console. Live calls go to POST https://api.typesafe.ai/v1/systemone from your browser when you paste a key. Without a key, the stage plays a recorded decision shaped like jev-1.13.0. Jev does not write the UI copy.